Answer:
Cloud
Explanation:
Cloud computing is a central form of storing data on a data center, provided online, to provides inexpensive and secure storage facilities and central accessing of document, using any device and accessing the data from anywhere and time.
Data stored in a clients computer system, would have to be transferred to another remote computer by using a portable storage, to share data. Using a cloud service or a database center service, a document can be accessed by a group of users at the same time, in different places, and assures a secure data in the database.
I think coders put in codes. Sry if that does not help.
Answer:
The matrix theory is used by hill cipher.
Explanation:
Th technique which uses matrix theory is hill cipher technique.
Hill cipher technique is a polygraphic substitution cipher and it is based on linear algebra.
For encrypting a message in Hill Cipher technique each block of n letters is multiplied by an invertible matrix of nxn and that to against modulus 26 and for the decryption of the message, every block is multiplied by the inverse of the matrix that was used for encryption.
